The Endy Luxe Sateen Sheets are made from long-staple cotton, a high-quality and durable fibre that makes our sheets rich-feeling and durable. They’re also STANDARD 100 by OEKO-TEX® certified, which ensures the materials and manufacturing adhere to strict textile safety standards and don’t use any harmful chemicals. However, the cotton used in the Luxe Sateen Sheets is not organic.